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arm64/mm: convert set_pte_at() to set_ptes(..., 1)

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Since set_ptes() was introduced, set_pte_at() has been implemented as a
generic macro around set_ptes(..., 1).  So this change should continue to
generate the same code.  However, making this change prepares us for the
transparent contpte support.  It means we can reroute set_ptes() to
__set_ptes().  Since set_pte_at() is a generic macro, there will be no
equivalent __set_pte_at() to reroute to.

Note that a couple of calls to set_pte_at() remain in the arch code.  This
is intentional, since those call sites are acting on behalf of core-mm and
should continue to call into the public set_ptes() rather than the
arch-private __set_ptes().

Link: https://lkml.kernel.org/r/20240215103205.2607016-9-ryan.roberts@arm.com
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Tested-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Barry Song <21cnbao@gmail.com>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morse <james.morse@arm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Ryan Roberts 2024-02-15 10:31:55 +00:00 committed by Andrew Morton
parent 532736558e
commit 659e193027
5 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm64/include/asm/pgtable.h
View File

@ -1084,7 +1084,7 @@ static inline void arch_swap_restore(swp_entry_t entry, struct folio *folio)
#endif /* CONFIG_ARM64_MTE */
/*
* On AArch64, the cache coherency is handled via the set_pte_at() function.
* On AArch64, the cache coherency is handled via the set_ptes() function.
*/
static inline void update_mmu_cache_range(struct vm_fault *vmf,
struct vm_area_struct *vma, unsigned long addr, pte_t *ptep,

2
arch/arm64/kernel/mte.c
View File

@ -67,7 +67,7 @@ int memcmp_pages(struct page *page1, struct page *page2)
/*
* If the page content is identical but at least one of the pages is
* tagged, return non-zero to avoid KSM merging. If only one of the
* pages is tagged, set_pte_at() may zero or change the tags of the
* pages is tagged, set_ptes() may zero or change the tags of the
* other page via mte_sync_tags().
*/
if (page_mte_tagged(page1) || page_mte_tagged(page2))

2
arch/arm64/kvm/guest.c
View File

@ -1072,7 +1072,7 @@ int kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm,
} else {
/*
* Only locking to serialise with a concurrent
* set_pte_at() in the VMM but still overriding the
* set_ptes() in the VMM but still overriding the
* tags, hence ignoring the return value.
*/
try_page_mte_tagging(page);

2
arch/arm64/mm/fault.c
View File

@ -205,7 +205,7 @@ static void show_pte(unsigned long addr)
*
* It needs to cope with hardware update of the accessed/dirty state by other
* agents in the system and can safely skip the __sync_icache_dcache() call as,
* like set_pte_at(), the PTE is never changed from no-exec to exec here.
* like set_ptes(), the PTE is never changed from no-exec to exec here.
*
* Returns whether or not the PTE actually changed.
*/

10
arch/arm64/mm/hugetlbpage.c
View File

@ -247,12 +247,12 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
if (!pte_present(pte)) {
for (i = 0; i < ncontig; i++, ptep++, addr += pgsize)
set_pte_at(mm, addr, ptep, pte);
set_ptes(mm, addr, ptep, pte, 1);
return;
}
if (!pte_cont(pte)) {
set_pte_at(mm, addr, ptep, pte);
set_ptes(mm, addr, ptep, pte, 1);
return;
}
@ -263,7 +263,7 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
clear_flush(mm, addr, ptep, pgsize, ncontig);
for (i = 0; i < ncontig; i++, ptep++, addr += pgsize, pfn += dpfn)
set_pte_at(mm, addr, ptep, pfn_pte(pfn, hugeprot));
set_ptes(mm, addr, ptep, pfn_pte(pfn, hugeprot), 1);
}
pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
@ -471,7 +471,7 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma,
hugeprot = pte_pgprot(pte);
for (i = 0; i < ncontig; i++, ptep++, addr += pgsize, pfn += dpfn)
set_pte_at(mm, addr, ptep, pfn_pte(pfn, hugeprot));
set_ptes(mm, addr, ptep, pfn_pte(pfn, hugeprot), 1);
return 1;
}
@ -500,7 +500,7 @@ void huge_ptep_set_wrprotect(struct mm_struct *mm,
pfn = pte_pfn(pte);
for (i = 0; i < ncontig; i++, ptep++, addr += pgsize, pfn += dpfn)
set_pte_at(mm, addr, ptep, pfn_pte(pfn, hugeprot));
set_ptes(mm, addr, ptep, pfn_pte(pfn, hugeprot), 1);
}
pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,